A Single-Epoch Determination Method for Integer Ambiguity of Beidou System Reference Stations

Abstract

The invention provides a whole-cycle ambiguity single epoch determining method for a Beidou system reference station, which belongs to the technical field of satellite positioning systems and positioning measurement. According to the whole-cycle ambiguity single epoch determining method, the phase of a whole-constellation three-frequency carrier is sufficiently utilized for observing data. The method comprises the steps of establishing an integer linear relationship between the phase whole-cycle ambiguities of carriers B2 and B3 in which a satellite orbit error and a troposphere error are eliminated; establishing an equal-proportion integer linear relationship between the phase whole-cycle ambiguities of the carriers B2 and B3; performing single epoch determination for the phase whole-cycle ambiguities of the carriers B2 and B3; and through the integer linear relationship between the phase whole-cycle ambiguities of the three-frequency carriers of a Beidou system, realizing single epoch determination for the whole-cycle ambiguity of the phase observed value of the three-frequency carriers of a Beidou system reference station. According to the whole-cycle ambiguity single epoch determining method, whole-cycle ambiguity determination is performed on a single double-difference satellite; resolving for a Beidou system reference station net carrier phase observation equation set is not required, and calculation amount in determining the ambiguity is reduced.

Description

technical field [0001] The invention relates to the technical field of satellite positioning system and positioning measurement, in particular to a method for determining a single epoch of ambiguity for a Beidou system reference station. Background technique [0002] The Beidou system with China's independent intellectual property rights has officially provided navigation and positioning services to the Asia-Pacific region. Since the satellite observation data of the Beidou system are affected by various observation errors, the accuracy of the standard positioning service provided by the Beidou system is about 10m. The standard positioning service of the Beidou system It can only meet the requirements of low-precision navigation and positioning; use the Beidou system reference station network to provide the Beidou system's regional error correction model or correction number, which can realize the error correction of Beidou system users within the coverage of the reference st...

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention proposes a single epoch determination method for the ambiguity of the Beidou system reference station, so as to realize the single epoch solution of the whole circle ambiguity of the Beidou system reference station, and to reduce the ambiguity of the Beidou system reference station. The amount of calculation for the determination of the carrier phase ambiguity of the network overcomes the problem that the geometric configuration of the Beidou system observation satellites changes slowly, which is not conducive to the real-time and rapid determination of the carrier phase ambiguity of the Beidou system reference station network, and eliminates the problem of the Beidou system broadcast satellites. The influence of the ephemeral orbit error on the resolution of the ambiguity of the whole cycle, avoiding the detection and processing of cycle slips of observation data, and reducing the workload of the Beidou system reference station network during the resolution of the ambiguity of the whole cycle

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